https://blogs.mercola.com:443/sites/vitalvotes/archive/2018/10/28/recording-of-mother_1920_s-voice-more-effective-than-smoke-alarm-study-finds.aspxIf your child is a sound sleeper who doesn’t stir even with a loud alarm clock ringing, then it’s possible they won’t wake up if the fire alarm happens to go off, either. To circumvent this before a horror like this occurs, researchersenCommunityServer 2008.5 SP1 (Debug Build: 31106.3070)